This is the 12353rd most frequent Turkish word.
hayatlarının
"Of their lives"
In this sentence, 'hayatlarının' means 'their lives.' It is used as a possessive genitive plural form to indicate belonging to multiple individuals.
Hayatlarının en güzel anlarını birlikte geçiriyorlar.
They are spending the most beautiful moments of their lives together.
Here, 'hayatlarının' again refers to 'their lives' indicating possession, expressing personal implication of the mentioned event on their lives.
Hayatlarının dönüm noktası olarak bu kararı aldılar.
They made this decision as the turning point of their lives.
In this usage, 'hayatlarının' refers to 'their lives,' demonstrating individual or collective belonging with philosophical or existential implications.